Answer:
7
8
9
10.
better check book pages for this kinda answer.
<span>when temperature varies:
volume & temperature vary directly @ constant pressure,... Charles' law
pressure & temperature vary directly @ constant volume,... Gay-Lussac's law
when temp is consatnt:
Pressure & volume vary inversely , ...Boyle's law
Hope This Helped! :3</span>
Answer : The final volume of gas will be, 
Explanation :
Charles' Law : It is defined as the volume of gas is directly proportional to the temperature of the gas at constant pressure and number of moles.

or,

where,
= initial volume of gas = 
= final volume of gas = ?
= initial temperature of gas = 
= final temperature of gas = 
Now put all the given values in the above formula, we get the final volume of the gas.


Therefore, the final volume of gas will be, 
Explanation:
Given that,
Initial volume, V₁ = 4.40 L
Initial pressure, P₁ = 2.6 atm
(a) Final pressure, P₂ = 6.2 atm
As per the relation,

(b) Again using the above relation,

Hence, this is the required ssolution.